PlainWater
States → California

CITY OF DAVIS

PWS ID: CA5710001 · DAVIS, California 95616

PFAS Detected

1 PFAS "forever chemicals" detected in testing under EPA's UCMR5 monitoring program.

Population Served
67,457
Total Violations
62
Health-Based Violations
61
Water Source
Surface Water

System Details

System Type
Community
Owner Type
Local
Connections
17,326
County
Yolo
School/Daycare
No
MCL Violations
61
Monitoring Violations
0
Treatment Tech Violations
0

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Selenium MCL 57 1990
Coliform (TCR) MCL 4 2005

PFAS Testing Results (UCMR5)

Results from EPA's Fifth Unregulated Contaminant Monitoring Rule. 9 of 540 samples detected PFAS.

Contaminant Date Result MRL Status
ADONA 8/22/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFHpA 8/22/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFHxS 8/22/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFHpS 8/22/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFNA 8/22/2024 <0.004 µg/L 0.004 µg/L Not Detected
PFOS 8/22/2024 <0.004 µg/L 0.004 µg/L Not Detected
PFOA 8/22/2024 <0.004 µg/L 0.004 µg/L Not Detected
PFDA 8/22/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFPeS 8/22/2024 <0.004 µg/L 0.004 µg/L Not Detected
PFDoA 8/22/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFHxA 8/22/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFUnA 8/22/2024 <0.002 µg/L 0.002 µg/L Not Detected
PFBS 8/22/2024 <0.003 µg/L 0.003 µg/L Not Detected
9Cl-PF3ONS 8/22/2024 <0.002 µg/L 0.002 µg/L Not Detected
PFBA 8/22/2024 <0.005 µg/L 0.005 µg/L Not Detected
NFDHA 8/22/2024 <0.02 µg/L 0.02 µg/L Not Detected
lithium 8/22/2024 <9 µg/L 9 µg/L Not Detected
PFEESA 8/22/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFMBA 8/22/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFPeA 8/22/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFMPA 8/22/2024 <0.004 µg/L 0.004 µg/L Not Detected
8:2 FTS 8/22/2024 <0.005 µg/L 0.005 µg/L Not Detected
11Cl-PF3OUdS 8/22/2024 <0.005 µg/L 0.005 µg/L Not Detected
6:2 FTS 8/22/2024 <0.005 µg/L 0.005 µg/L Not Detected
HFPO-DA 8/22/2024 <0.005 µg/L 0.005 µg/L Not Detected
NMeFOSAA 8/22/2024 <0.006 µg/L 0.006 µg/L Not Detected
NEtFOSAA 8/22/2024 <0.005 µg/L 0.005 µg/L Not Detected
PFTrDA 8/22/2024 <0.007 µg/L 0.007 µg/L Not Detected
PFTA 8/22/2024 <0.008 µg/L 0.008 µg/L Not Detected
4:2 FTS 8/22/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFMPA 8/22/2024 <0.004 µg/L 0.004 µg/L Not Detected
PFEESA 8/22/2024 <0.003 µg/L 0.003 µg/L Not Detected
4:2 FTS 8/22/2024 <0.003 µg/L 0.003 µg/L Not Detected
lithium 8/22/2024 <9 µg/L 9 µg/L Not Detected
NMeFOSAA 8/22/2024 <0.006 µg/L 0.006 µg/L Not Detected
NEtFOSAA 8/22/2024 <0.005 µg/L 0.005 µg/L Not Detected
PFTrDA 8/22/2024 <0.007 µg/L 0.007 µg/L Not Detected
PFTA 8/22/2024 <0.008 µg/L 0.008 µg/L Not Detected
NFDHA 8/22/2024 <0.02 µg/L 0.02 µg/L Not Detected
PFMBA 8/22/2024 <0.003 µg/L 0.003 µg/L Not Detected
8:2 FTS 8/22/2024 <0.005 µg/L 0.005 µg/L Not Detected
6:2 FTS 8/22/2024 <0.005 µg/L 0.005 µg/L Not Detected
PFBA 8/22/2024 <0.005 µg/L 0.005 µg/L Not Detected
HFPO-DA 8/22/2024 <0.005 µg/L 0.005 µg/L Not Detected
ADONA 8/22/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFPeS 8/22/2024 <0.004 µg/L 0.004 µg/L Not Detected
PFNA 8/22/2024 <0.004 µg/L 0.004 µg/L Not Detected
PFHpS 8/22/2024 <0.003 µg/L 0.003 µg/L Not Detected
9Cl-PF3ONS 8/22/2024 <0.002 µg/L 0.002 µg/L Not Detected
PFOA 8/22/2024 <0.004 µg/L 0.004 µg/L Not Detected
Data Sources: EPA Safe Drinking Water Information System (SDWIS), Q4 2025. PFAS data from EPA UCMR5 monitoring program (2023-2025). This data is provided for informational purposes only.